A Review oe the Land Mollusca op Western Australia. 
37 
comparatively largo apical whorls, the ajiex, as above, concentrically spirally 
striate, the adult sculpture radial threads, with larger radial ridges, more or 
less distant, and usually well marked, rarely with concentric striation. The 
umbilicus is com|iaratively wide and open, the mouth circular, the lip thin. 
The typo of Wef<tralnnwa. is TF. experta nov. 
The true Paralaoma (Tredale Proc. Malac. Soc. (Lond.), Vol. X., ]). 380, 
Sept., 1013) was based on a similar looking Kermadec shell, which has a 
smooth or radiately striate iirotoconch, and which lived in dry places, and the 
majority of x\ustralinn Paralaomids have the same habit. 
Westralaoma experta sp. nov. 
Plate r., figs. 18 and 28. 
1868 — Helix morti Cox, Mon. Austr. Land Shells, ii. 21, pi. XT., fig. 13, 
W. Australia. 
1894 — Patiila morti Smith, Proc. Malac. Soc. (Loud.), A"ol, !.. p. 87, June; 
above i'(‘Cord only. 
When Smith incdudcd this species on Cox’s record, he noted ‘‘This is the 
only instance among the. Australian Helices in which the same siteeies occurs 
on both sides of the continent,” as it had been described from Sydney. Onee 
again geographical values jirove more important than superficial association, 
as upon re-examination, the Westralian shells are seen to differ in the essen- 
tial feature of the sculpture of the protoeonch. The series so named by Cox 
is available and the species is named as above. Shell very small, subeonical, 
narrowly umbilicate, brown. The apex is large, bulbous, of two whorls, 
spirally finely striate, adult whorls sculpturc'd with distant radial ridges and 
fine striae, on the last whorl the strong radials number between thirty and 
forty, the interstices flnel.v radially striate with a finer concentric striation, 
forming a .sid,iretieulation under a high power; the mouth is large, the outer 
lip thin. Breadth 1.2,5 mm.; height ..5 mm. The type locality is King George’s 
Sound, collected by hTasters. 
Westralaoma scitula sp. nov. 
Plate I., fig. 19. 
This species, discovered by Mr. Sidney W. -lackson at the Bow River, 
South Coast, is somewhat depressed, the umbilicus open, deep, and about 
one-third of the basal breadth. 
The apical whorls are finely concentrically striate without any varix, the 
adult sculi)ture being cornjiosed of fine radial striae, with about twenty to 
twenty-five developing into ]irominent ridges, about six to eight striae between 
each ridge. The whorls are convex, the last whorl subangulalely rounded, but 
not keeled, the mouth open subcircular, lip thin, columella straight, a little 
reflected, not obscuring the umbilicus in any way. 
Breadth 1..5 mm.; height .6 mm. 
Found in Hazel and Karri scrub under debris on ground. 
Westralaoma expicta sp. nov. 
Plate ITT., fig. 4. 
A typical Paralaomid form with the apex elevated, superficially smooth 
but, with a strong power, concentric lining can be recognised: adult .scul))ture 
of the regular Paralaomid style, fine radials with distant coarse ridges about 
